Severe Heavy Rainfall and Unusual Structure of Typhoon Matsa
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Abstract:
By using the data from AWS stations, radar observations, reanalysed data of NCEP 1°×1°, adopting the relative coordinate system with Matsa moving, a case study is made of the abnormal rainstorm process for typhoon Matsa in August 2005. The results indicate: (1) The structure of typhoon Matsa is quite different from common typhoons, and the unusual distribution of rainfall is closely related with the special situation. (2) There was a number of rain clusters reproduced and moved in the first and second quadrant of the typhoon system, which were corresponding to the areas where there were strongweak interweaved radar echoes for updrafts and downdrafts occurred alternately; the frequent appearing and movement of mesoscale “rain cells” were key mechanisms for the generation of the severe rainstorm. (3) The areas where local unusual variability occurred due to special structure changes in certain quadrants of the typhoon system can be a significant indicator for the monitoring and forecasting of typhoon heavy rainfall.
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Supported by:Beijing E-Tiller Technology Development Co., Ltd.
Supported by:Beijing E-Tiller Technology Development Co., Ltd.